20400140222 has 16 divisors (see below), whose sum is σ = 38150911872. Its totient is φ = 7948106520.

The previous prime is 20400140179. The next prime is 20400140297. The reversal of 20400140222 is 22204100402.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20400140222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66234068 + ... + 66234375.

It is an arithmetic number, because the mean of its divisors is an integer number (2384431992).

Almost surely, 2^20400140222 is an apocalyptic number.

20400140222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20400140222 is a deficient number, since it is larger than the sum of its proper divisors (17750771650).

20400140222 is a wasteful number, since it uses less digits than its factorization.

20400140222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132468463.

The product of its (nonzero) digits is 256, while the sum is 17.

Adding to 20400140222 its reverse (22204100402), we get a palindrome (42604240624).

The spelling of 20400140222 in words is "twenty billion, four hundred million, one hundred forty thousand, two hundred twenty-two".